This service provides complete cloning, repair, data extraction, and recovery for the BMW CAS4 and CAS4+ immobilizer modules used in nearly all early F-series BMW vehicles.

CAS4 is a security-critical module controlling:

• Immobilizer / ISN

• Key recognition & keyless start

• Push-to-start authorization

• Rolling code authentication

• Vehicle access & locking

• Communication with DME/DDE, FEM/BDC (when present), Kombi, and gateway modules

CAS4/CAS4+ units commonly fail due to:

• Corrupted EEPROM

• Dead MCU / corrupted flash

• Water intrusion

• Failed programming attempt

• Battery voltage drop during update

• Keys not recognized

• Vehicle stuck in no crank / no start

• “Immobilizer fault” messages

• No communication with scan tools

Using professional BDM-style bench programming tools, we safely extract and transfer all CAS4/CAS4+ data.

1. CAS4 / CAS4+ Cloning

We transfer:

• EEPROM

• FLASH

• ISN (immobilizer code)

• VIN

• Key data

• Rolling codes

• Personalization data

• Vehicle options/configuration

2. CAS4 Repair / EEPROM Reconstruction

We restore corrupted CAS4 modules, repairing:

• No communication

• Corrupted EEPROM

• Flash-level data corruption

• Dead CAS after a bad programming attempt

3. Plug-and-Play Output

Your CAS4/CAS4+ will function exactly like the original.
No dealer coding is required.

⭐ SUPPORTED BMW MODELS (CAS4 / CAS4+)

CAS4 was used on nearly all early F-Series vehicles, including:

BMW 1-Series (F20/F21)

• 116i, 118i, 120i, 125i

• M135i

BMW 2-Series (F22/F23)

• 220i, 228i, M235i

BMW 3-Series (F30/F31/F34)

• 316i, 320i, 328i, 335i

• 330i, 340i (early years)

BMW 4-Series (F32/F33/F36)

• 420i, 428i, 435i

BMW 5-Series (F10/F11)

• 528i, 535i, 550i

BMW 6-Series (F06/F12/F13)

• 640i, 650i

BMW 7-Series (F01/F02 early)

• 740i, 750i

BMW X-Series

• X3 (F25)

• X4 (F26)

• X5 (F15 early)

• X6 (F16 early)

BMW i-Series

• i3 (early production)

MINI (CAS4-style)

Some newer MINI models may use CAS4-based immobilizer (market dependent).

If your immobilizer module label reads CAS4 or CAS4+, this service applies.

WHAT YOU NEED TO SEND

• Original CAS4 or CAS4+ module

• Replacement module (if cloning to a donor)

• Working keys (recommended for validation)

• Note including:

  • Name

  • Phone number

  • Return address

  • Vehicle year/make/model

WHAT’S INCLUDED

• Full EEPROM + FLASH cloning

• ISN extraction & synchronization

• Key data transfer

• VIN transfer

• Corrupted CAS repair

• No communication recovery

• Bench testing

• Final plug-and-play setup

TURNAROUND TIME

• Same-day or 1–2 business days

• Rush options available